regex‑recursion is a JavaScript plugin (also usable standalone) that extends native RegExp objects with fixed‑depth recursive subpatterns, letting developers write patterns like `(?R=N)` or `\g<name&R=N>` to match nested structures such as balanced parentheses, palindromes, or equal‑length token sequences. It integrates with the Regex+ library or can be applied to raw pattern strings, generating ordinary `RegExp` instances that work in Node and browsers. The tool is aimed at web developers and library author­s who need powerful, recursion‑based regex capabilities without leaving the JavaScript ecosystem.